A container around every group
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Rule · bucket: judgment · severity: note · detector: none · since: v0.1.0
Section: Things to avoid
Group: Generic-AI aesthetic

Forbidden:
  Borders, cards and background panels wrapping each cluster on the page

Instead:
  A container is the **strongest** grouping cue and the heaviest. Reach for it last.

Four tools group elements, in ascending strength: **continuity** (aligned in a line), **similarity** (same size, shape, colour), **proximity** (closer together than to anything else), **common region** (a shared container). Use the weakest one that works.
Where several already apply — a table's rows are aligned, alike, and close — the container adds clutter and no information. Remove it and check whether the grouping still reads. It usually does.